JP4275022B2 - Aluminum extrusions for vehicle floor structures - Google Patents

Description

  TECHNICAL FIELD The present invention relates to an aluminum extruded shape used as a vehicle floor structure, and more specifically, an aluminum extruded shape for floor structure in which a lower rail and a floor into which an upper rail fixed to a seat is fitted are integrally formed. Regarding materials.

  Aluminum extruded sections are lighter than iron and have the advantage that they can be extruded in any cross-sectional shape, and thus have been widely used in railway vehicle structures and automobile parts. In railcars, aluminum extruded profiles (also called double skins) with hollow parts have already been used as vehicle body structures, and aluminum frame-structured vehicles have been manufactured as automobile parts. The possibility of application to materials is also being studied.

JP-A-7-144661 JP-A-9-99870

It is necessary to attach a seat to the floor material of the vehicle, and when it is a sliding seat, it is necessary to attach a slide rail between the floor material and the seat. At this time, the upper rail is fixed to the seat side, and the lower rail to which the upper rail is fitted is fixed to the floor side (see Patent Document 2), but the fixing is performed by bolting or welding. However, when fixing to the floor material by bolting, it is necessary to insert a fastening block with a thread in the hollow portion of the aluminum extruded profile, which increases the number of parts, man-hours and weight, In the case of fixing by welding, there is a concern that the material may be locally softened due to thermal effects or the accuracy may be lowered due to welding distortion.
An object of the present invention is to solve the problems of such a conventional aluminum extruded shape for floor structure.

An aluminum extruded profile for a vehicle floor structure according to the present invention comprises upper and lower face plates, a plurality of ribs connecting them, and a lower rail fitted with an upper rail fixed to the seat side. In a cross section perpendicular to the extruding direction, an opening is formed in a channel shape, and is disposed at one or a plurality of places in the width direction of the cross section, and its bottom wall is integrated with the upper face plate, or the bottom wall is It is integrated with the lower face plate. In the latter case, the upper wall of the lower rail can be integrated with the upper face plate. Here, the integration means that the bottom wall or the top wall is formed continuously with the face plate.
In the present invention, aluminum includes an aluminum alloy.

  In the aluminum extruded shape for floor structure according to the present invention, since the floor material and the lower rail are integrally formed, the number of parts (the lower rail itself and the fastening block) is reduced as compared with the conventional separate structure, and the bolt There is no need for a process for fastening or welding, the process can be shortened and the weight can be reduced, and there is no material deterioration and high dimensional accuracy can be realized. Especially for long slide rails (for example, for minivans in 2 or 3 row seats), it has been difficult to achieve the dimensional accuracy of the lower rail, but the dimensional accuracy is improved by the integral molding by extrusion (and Great weight reduction effect). Furthermore, since the floor material and the lower rail have an integrated structure, the overall rigidity is increased, thereby reducing the weight and improving the dimensional accuracy.

  In the extruded aluminum structural member for floor structure according to the present invention, when the bottom wall of the lower rail is integrated with the lower face plate, all or part of the lower rail is built into the floor material. The seat space can be lowered and the indoor space can be used widely, and at the same time, noise and vibration when the upper rail slides can be reduced. There is also a manufacturing advantage that the balance during extrusion is good. These effects are particularly remarkable when the lower rail has a structure in which the upper wall of the lower rail is integrated with the front face plate (that is, when the entire lower rail is built in the floor material).

Hereinafter, the present invention will be described more specifically with reference to FIGS.
1 has an upper face plate 1, a lower face plate 2 and a plurality of truss-shaped ribs 3 connecting them as a basic structure, and a plurality of them in a cross section perpendicular to the extrusion direction. The closed cross section is arranged in the width direction and forms a plate-like double skin structure as a whole, and the lower rail 4 is integrally formed at two places in the width direction in the cross section. The lower rail 4 is formed to be thicker than the other parts, and has a lip channel (or C channel) shape as a whole. The bottom wall 5 is integrated with the face plate 2 and the upper wall 6 is integrated with the face plate 1. The side walls 7 connect the face plates 1 and 2 vertically, and an opening 8 along the extrusion direction is formed at the center of the upper wall 6. The outer surface of the face plate 1 and the outer surface of the upper wall 6 of the lower rail 4 (both are the upper surface of the extruded shape member A) are flush with each other and are flat. The lower surface of A) is flush and flat. The side wall 7 also functions as a rib for connecting the double-sided plates 1 and 2 and increases the rigidity of the extruded shape member A.

The extruded profile A has a shape in which the lower rail 4 is sandwiched between closed cross sections (a shape in which the entire lower rail is built in the floor material), and is entirely plate-shaped and has a low height.
This extruded profile A is used for a vehicle floor structure, and, for example, as shown in FIG. 2, an upper rail 11 fixed to the lower end of a seat 9 is fitted into the lower rail 4. Reference numeral 12 denotes a sliding ball interposed between the side wall 7 of the lower rail 4 and the upper rail 11.

3 also has an upper face plate 1, a lower face plate 2 and a plurality of ribs 3 connecting them as a basic structure, and a plurality of closed cross sections are formed by them. A plate-like double skin structure is formed, and the lower rail 4 is integrally formed at two locations in the width direction in a cross section perpendicular to the extrusion direction. The lower rail 4 is formed to be thicker than other portions, and has a lip channel (or C channel) shape as a whole, and its bottom wall 5 is integrated with the face plate 1 and is connected in substantially the same plane. An opening 8 along the extrusion direction is formed at the center of the. In the extruded profile A shown in FIG. 1, the lower rail 4 is built in the floor material (basic structure portion). However, in the extruded profile B, the lower rail 4 is moved upward from the plate-like floor material. It has a protruding shape.
The extruded shape member B is used for a vehicle floor structure. For example, as shown in FIG. 4, an upper rail 11 fixed to the lower end of a seat 9 is fitted into the lower rail 4. Reference numerals 13 and 14 denote sliding resin materials fixed to the upper surface of the bottom wall 5 of the lower rail 4 and the lower surface of the upper rail 11, respectively.

  An aluminum extruded profile C shown in FIG. 5 is a modification of the aluminum extruded profile A shown in FIG. 1, and ribs 3 connecting the upper face plate 1 and the lower face plate 2 are perpendicular to the face plates 1 and 2. Is different from the extruded aluminum material A shown in FIG.

  An aluminum extruded profile D shown in FIG. 6 is an example of use of the aluminum extruded profile A shown in FIG. 1, in which ventilation holes 15 are formed in the upper face plate 1. The ventilation hole 15 is opened in the vehicle, and the interior of the vehicle can be air-conditioned by passing warm air or cold air through the hollow portions 16 and 17 in which the ventilation hole 15 is formed. In this example, warm air or cold air is passed only through the hollow portions 16 and 17 (the hollow portion surrounded by the upper face plate 1 and the truss-shaped rib 3) and not through the hollow portions 18 to 20 outside the company. However, since the ventilation cross section can be reduced, the efficiency of air conditioning is good. Further, if the opening 15 is not formed, or if formed, the floor 15 can be heated by closing it and passing warm air through the hollow portions 16 and 17.

  In the above example, the aluminum extruded shape members (A to D) are used as a vehicle floor structure without being connected. However, a plurality of aluminum extruded shapes, such as FSW (friction stir welding) and welding, can be used for width. The vehicle floor structure can be configured by connecting in the direction. For example, a plurality of aluminum extruded profiles are connected to form a wide floor structure, or two aluminum extruded profiles each having only one lower rail are connected in the width direction to form a floor structure having a pair of lower rails. It is possible to do.

  The aluminum extruded profile E shown in FIG. 7 has an upper face plate 1, a lower face plate 2 and a plurality of ribs 3 connecting them as a basic structure, and thereby a plurality of closed cross sections in a cross section perpendicular to the extrusion direction. 1 and the closed cross-sections are arranged in the width direction to form a plate-like double skin structure as a whole, and the lower rail 4 is integrally formed in the cross-section. However, the lower rail 4 is different in that the lower rail 4 is formed only at one position in the width direction, and that the lower rail 4 is closed and no opening is formed in the upper wall 6 in the extruded state.

  When this extruded shape E is used for a vehicle floor structure, as illustrated in FIGS. 8 and 9, two are connected in the width direction by, for example, FSW (connecting portion 21), and the lower rail 4 is a channel with a lip (C An opening 8 is formed in the central part of the upper wall 6 of the lower rail 4 along the extrusion direction so as to have a cross section of the channel). The openings 8 can be formed by boring machining, but are not formed at both ends (locations indicated by arrows 22) in the extrusion direction. This floor structure has high rigidity because both end portions 22 in the extrusion direction at the location of the lower rail 4 remain in a closed cross section. Moreover, since the location of the lower rail 4 has a closed cross section at the time of extrusion, the dimensional accuracy of the lower rail 4 and the overall dimensional accuracy of the extruded shape E can be improved as compared with the extruded profiles A to C in which the location is an open cross section. There is.

  On the other hand, the upper rail 11 is disposed in the lower rail 4 and is fitted into the lower member 11a of the channel cross section having a width wider than the opening 8 of the lower rail 4 and the opening 8 of the lower rail 4, and the lower end is connected to the lower member 11a. The upper member 11b has a quadrangular cross section whose upper end is connected to the seat mounting member 23. The lower member 11 a and the upper member 11 b are both made of an aluminum extruded profile, the lower member 11 a slides on the bottom wall 5 of the lower rail, and the upper member 11 b slides inside the opening 8. However, the lower member 11 a and the upper member 11 b do not slide directly with the bottom wall 5 or the opening 8, but both pass through a sliding ball, a resin material, or the like (not shown).

  Since the upper rail 11 is divided into two members, a lower member 11a disposed in the lower rail 4 and an upper member 11b fitted into the opening 8 of the lower rail, both end portions 22 in the pushing direction of the lower rail 4 have a closed cross section. Can be assembled to the lower rail 4 (even if the opening 8 is not formed). That is, first, only the lower member 11a is inserted into the lower rail 4 from either one of the front and rear end surfaces of the lower rail 4, and then the upper member 11b is fitted into the opening 8 from above and connected to the lower member 11a to connect the upper rail 11 to the lower rail 11a. Constitute.

  10 and 11 show another embodiment of the vehicle floor structure. The extruded aluminum shape F is the same as the extruded shape E shown in FIG. Also in this floor structure, the two extruded profiles F are connected in the width direction by, for example, FSW (connecting portion 21), and the upper wall 6 of the lower rail 4 so that the lower rail 4 has a cross-section with a lip channel (C channel). An opening 8 is formed along the extrusion direction at the center of the. The opening 8 can be formed by boring machining, but is not formed at one end (indicated by the arrow 22) in the extrusion direction. In this floor structure, one end 22 in the extrusion direction of the lower rail 4 remains in a closed cross section, but the other end 24 has an open cross section. Therefore, compared with the floor structure shown in FIGS. Low rigidity. If necessary, a reinforcing material may be attached to the end 24 side.

On the other hand, the upper rail 11 is made of an extruded aluminum material having a π-shaped cross section, has upper and lower end flanges that are wider than the opening 8 of the lower rail 4, and most of the upper rail 11 is disposed in the lower rail 4 and has an upper end. The portion protrudes upward from the opening 8. The upper rail 11 is fixed to the seat mounting member 23 via a connecting member 25 made of an aluminum extruded shape member having a hollow rectangular cross section. The upper rail 11 and the connecting member 25 may be made of an integral aluminum extruded shape (in this case, the whole may be regarded as the upper rail). The upper rail 11 slides on the bottom wall 5 of the lower rail and the inside of the opening 8, both of which are via a sliding ball or resin material (not shown).
Since the upper rail 11 is made of one aluminum extruded section (in the example of FIGS. 8 and 9, the upper rail is made of two members), in order to insert the upper rail 11 into the lower rail 4, the end 24 side is opened. Therefore, it is inserted into the lower rail 4 from the end surface on the end 24 side.

1 is a cross-sectional view of an aluminum extruded profile according to the present invention. It is sectional drawing when an upper rail is fitted to the extruded shape member. It is sectional drawing of the other aluminum extrusion shape material which concerns on this invention. It is sectional drawing when an upper rail is fitted to the extruded shape member. It is sectional drawing of the other aluminum extrusion shape material which concerns on this invention. It is a perspective view explaining one utilization method of the aluminum extrusion shape material concerning the present invention. It is sectional drawing of the other aluminum extrusion shape material which concerns on this invention. It is a perspective view when forming an opening in the extruded profile and fitting an upper rail. It is the II sectional drawing. It is a perspective view when forming an opening in the extruded profile and fitting another upper rail. It is the II-II sectional view.

Explanation of symbols

1 Upper face plate 2 Lower face plate 3 Rib
4 Lower rail 5 Bottom wall 6 Upper wall 7 Side wall 8 Opening 11 Upper rail

Claims (4)

The upper and lower face plates, a plurality of ribs connecting them, and an upper rail fixed to the seat side are fitted with a lower rail, and the lower rail is a channel shape whose opening is directed upward in a cross section perpendicular to the extrusion direction. The vehicle floor structure in which the lower rail and the floor are integrally formed is arranged at one or a plurality of locations in the width direction of the cross section and the bottom wall is integrated with the upper face plate. Aluminum extruded profile. The upper and lower face plates, a plurality of ribs connecting them, and an upper rail fixed to the seat side are fitted with a lower rail, and the lower rail is a channel shape whose opening is directed upward in a cross section perpendicular to the extrusion direction. The vehicle floor in which the lower rail and the floor are integrally formed is arranged at one or a plurality of locations in the width direction of the cross section and the bottom wall is integrated with the lower face plate. Structural aluminum extrusions. The aluminum extruded shape for a floor structure of a vehicle according to claim 2 , wherein an upper wall of the lower rail is integrated with the upper face plate. The floor structure aluminum for a vehicle according to claim 2 or 3 , wherein the opening of the lower rail is formed by machining on a closed upper wall. Extruded shape.

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